2024.6.5

第六十四天

所花时间：2小时

代码量：200+

博客量：1

了解到的知识点：

政策查询3

Mainactivity.java

package com.example.keji2;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

import com.example.keji2.dao.policydao;
import com.example.keji2.entity.policy;
import com.example.keji2.utils.DbOpenHelper;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView listview;
    private static final String TAG = "mysql-tb_user-policyDao";


    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listview = findViewById(R.id.liebiao);
        Button searchButton = findViewById(R.id.sousuo);
        EditText EditTextKeyword = findViewById(R.id.shuru);
        searchButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (v.getId() == R.id.sousuo) {
                    String keyword = EditTextKeyword.getText().toString().trim();
                    performSearch(keyword);
                }
            }
        });
    }
    private void performSearch(String keyword) {
        class DataWrapper {
            List<policy> dataList;
        }
        DataWrapper dataWrapper = new DataWrapper();
        new Thread(new Runnable() {
            @Override
            public void run() {
                List<policy> zhengce = null;
                try {
                    zhengce = policydao.search(keyword);
                    Log.d(TAG, "run: 数据库数据读取成功");
                } catch (SQLException e) {
                    throw new RuntimeException(e);
                }
                List<String> list = new ArrayList<>();
                for (int i = 0; i < zhengce.size(); i++) {
                    list.add(zhengce.get(i).getName()); // Changed to getName() to display policy names
                }
                // 在 UI 线程上更新 UI
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, list);
                        listview.setAdapter(adapter);
                        Log.d(list.toString().trim(), list.toString());
                    }
                });
            }
        }).start();
    }
}